Exam-style question
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Light meter circuit ? choose the output link. Use this to support: Describe the role of negative feedback.
- A.light meter circuit: the measured voltage changes because the light sensor changes the divider ratio for The ideal operational amplifier.
- B.light meter circuit: uses a fixed output voltage.
- C.light meter circuit: claims light changes magnetic flux.
- D.light meter circuit: does not connect sensor to output.
Model answer
What a good answer should say
- The correct option is light meter circuit: the measured voltage changes because the light sensor changes the divider ratio for The ideal operational amplifier.
Explanation
Why this works
This is the best answer because the light meter circuit context requires that exact electronics relationship. The other options are incorrect because they use a different component, reverse the circuit behaviour, or omit the output interpretation required for The ideal operational amplifier.
Common mistake
No common mistake is linked to this question yet.